A chloride sulfite or sulfite chloride is a chemical compound that contains chloride and sulfite anions (SO32− Cl−). The known compounds of this type are all late transition metal sulfito complexes. Chlorine may be present as a ligand (chloro) or as an ion (chloride). The sulfito ligand can connect to the metal atom by way of an oxygen, or a sulfur atom. It can also link to the metal atom using two oxygen atoms as a bidentate ligand.
Chloride sulfites are not to be confused with the chlorosulfites, which are compounds containing the SO2Cl− ion or -SO2Cl group in organic compounds, where it is also called chlorosulfinate. The chlorosulfates also have the formula SO3Cl− as a single ion, whereas chloride sulfites have three negative charges.
The mercury complex with formula ClHgSO3− is found in the acid gas scrubbers that purify pollution from smokestacks. However, it decomposes and does not capture mercury in this application. This complex can form an ammonium salt: ammonium chlorosulfitomercurate(II) NH4[ClHgSO3], which decomposes over 130 °C. The salt is formed from mercuric chloride and ammonium sulfite water solutions.
List nameformularatio SO3:Clmwsystemspace groupunit cellvolumedensityopticalreferenceschlorosulfito bis-(1,2-diaminopropane)cobalt(III) monohydrateCo(NH2CH2CH2CH2NH2)2(SO3)Cl·H2O1:1red brownchlorosulfito bis-(1,2-diaminopropane)cobalt(III) tetrahydrate sodium chlorideCo(NH2CH2CH2CH2NH2)2(SO3)Cl·4H2O·NaCl1:1brownchlorosulfito (1,2-diaminopropane)(ethylenediamine)cobalt(III) monohydrate sodium chlorideCo(NH2CH2CH2CH2NH2)(NH2CH2CH2NH2)(SO3)Cl·H2O·NaCl1:1brick redchlorosulfito bis-(ethylenediamine)cobalt(III) monohydrate[Co(NH2CH2CH2NH2)2(SO3)Cl]·H2O1:1pink brownammino sulfito bis-(ethylenediamine)cobalt(III) chloride[Co(NH2CH2CH2NH2)2(SO3)NH3]Clyellow brownsulfito bis-(ethylenediamine)cobalt(III) chloride[Co(NH2CH2CH2NH2)2(SO3)]Clbrown-redsulfito tetraammino chloro osmiumOsSO3(NH3)4Cl1:1pink brownNa6[Os(SO3)4Cl2]·10H2O4:2purpleNa7[Os(SO3)5Cl]·6H2O5:1pale violetK8[Os(SO3)4Cl4]4:4brownsulfito aquo octaammino μ-nitrido diosmium trichloride[Os2N(SO3)(NH3)8H2O]Cl31:3yellow brownNa2[Ir(SO3)2(NH4)3Cl]2:1Ferrari, A., and C. Colla. "Iridionitrites of ammonium, potassium, rubidium, cæsium and thallium." Gazzetta Chimica Italiana 63 (1933): 507-513trisodium diaquadichlorodisulfitoiridate(III) heptahydrateNa3[IrCl2(SO3)2(OH2)2]·7H2OPnmaZ=4yellowtrisodium disulfito dichloro diammino iridium tetrahydrateNa3[Ir(SO3)2(NH4)2Cl2]·4H2O2:2trisodium disulfito dichloro diammino iridium hexahydrateNa3[Ir(SO3)2(NH4)2Cl2]·6H2O2:2pale yellowtripotassium diaquadichlorodisulfitoiridate(III) dihydrateK3[IrCl2(SO3)2(OH2)2]·2H2OC2Z=2yellowNa5[Ir(SO3)2Cl4]2:4pentapotassium disulfito tetrachloro iridium hexahydrateK5[Ir(SO3)2Cl4]·6H2Olight orangepentasodium dichlorobis(hydrogendisulfito)iridate(III)trans-Na5[IrCl2{(SO3H)(SO3)}2]·10H2OC2/cpale yellowpentapotassium dichlorobis(hydrogendisulfito)iridates(III)trans-K5[IrCl2{(SO3H)(SO3)}2]·5H2Opale yellowNa7[Ir(SO3)4Cl2]4:2hepta sodium tetrasulfito dichloro iridium heptahydrateNa7[Ir(SO3)4Cl2]·7H2Opale yellowK7[Ir(SO3)2(NO3)2Cl]4:2russ j inor chem 6 1961 1247(NH4)5lr(SO3)2Cl42:4monoclinicP21/na = 11.10 b = 7.25 c = 7.25 β= 96.5 Z = 2(NH4)4lr(SO3)2Cl3·4H2O2:3monoclinica = 10.44 b = 9.46 c = 7.48 β = 90.5, Z = 2NH4[ClHgSO3]1:1Pnmaa=15.430 b=5.525 c=6.679 Z=4K[HgSO3Cl]·KCl·H2O1:2761.18triclincP1_a = 6.1571 b = 7.1342 c = 10.649 α = 76.889, β = 88.364, γ = 69.758° Z=4426.84.358K[HgSO3Cl]·KCl·HgCl21:4701.24monoclinicP21/ma=9.532 b=5.9593 c=10.176 β =110.522 Z=2541.34.302K[HgSO3Cl]·HgCl21:3626.69orthorhombicCmc21a=5.9313 b=21.746 c=6.7899 Z=4879.794.753NH4[HgSO3Cl]·HgCl21:3605.65orthorhombicCmc21a=5.962 b=22.247 c=6.958 Z=4923.04.358NH4[HgSO3Cl]·HgCl2·NH4Cl1:4659.12monoclinicP21/ma=9.712 b=6.138 c=10.401 β =110.92 Z=2579.23.779(K[HgSO3Cl])2·KCl·HgCl22:51056.44orthorhombicPnmaa=22.158 b=5.9736 c=12.249 Z=41621.24.328
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